Sue·to·ni·us 
(swē-tōnē-əs) Full name Gaius Suetonius Tranquillus. fl. second century AD.
(swē-tōnē-əs) Full name Gaius Suetonius Tranquillus. fl. second century AD. Roman historian whose major work, Lives of the Caesars, is an account of the lives of the first 12 Roman emperors.